How to Procedures Be compatible with cooling system hose and seal materials. Provide adequate freeze protection. The rest of this section will describe the requirements for the proper usage of the water, antifreeze, and corrosion inhibitors. It will also describe the coolants and additives that are not recommended by Detroit™ and have been proven harmful to Detroit™ engines. Coolants NOT Permitted The following coolants are not to be used in Detroit™ engines: Automotive/Passenger car-type coolants must not be used in Detroit™ engines because they offer no liner pitting protection. Also, these types of coolants generally contain high levels of phosphates and silicates.
Methyl alcohol-based antifreeze must not be used in Detroit™ engines because of its effects on the nonmetallic components of the cooling system and its low boiling point. Methoxy propanol-based antifreeze must not be used in Detroit™ engines because it is not compatible with fluorocarbon elastomer seals found in the cooling system. Glycol-based coolants formulated for Heating/Ventilation/Air Conditioning (HVAC) must not be used in Detroit™ engines. These coolants generally contain high levels of phosphates, which will form deposits on hot internal engine surfaces, reduce heat transfer, and cause water pump seal leaks. Waterless-type coolants must not be used.
Nitrite Organic Acid Technology (NOAT) must not be used in Detroit™ engines because with poor maintenance components become more vulnerable. Non-Formulated Additives NOT Permitted The following additives should not be used in Detroit™ engines: Soluble Oils: Soluble oil additives are not approved for use in Detroit™ engine cooling systems. A small amount of oil adversely affects heat transfer. For example, a 1.25% concentration of soluble oil increases the fire deck temperature 6%. A 2.50% concentration increases the fire deck temperature 15%. The use of soluble oil additives may result in engine overheating and/or failure. Chromates:
Chromate additives are not approved for use in Detroit™ engine cooling systems. Chromate additives can form chromium hydroxide, commonly called “green slime.” This, in turn, can result in engine damage due to poor heat transfer. Cooling systems operated with a chromate-inhibited coolant must be chemically cleaned with Detroit™ Genuine Coolant Twin Pack cooling system cleaner/conditioner (or equivalent sulfamic acid/sodium carbonate cleaner) and flushed. Phosphate Inhibitors: Phosphate has tendency to form deposits on surfaces transferring high heat which ultimately affect cooling capabilities. Phosphate deposits on water pump seals will result in coolant leakage across seal faces.
98 All information subject to change without notice. Copyright © 2017 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0192